The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
Troutnut on Jul 20, 2006July 20th, 2006, 5:25 pm EDT
I'm not sure why I had this specimen in the Baetidae to begin with. The eyes aren't turbinate and the hind wings are fairly large. I'm going to guess Paraleptophlebia at a glance, but I should come back to this one later. Any thoughts?
It's a pity the pictures are so fuzzy and dust-spotted up close. I took this picture before I really learned how to use and maintain my Canon 20D.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
The claspers certainly look like those of Paraleptophlebia. Have you got a higher resolution photo of the penes? When I blow up the photo that shows them, it distorts too much to see them clearly.
Troutnut on Jul 21, 2006July 21st, 2006, 1:24 am EDT
Sorry, I don't have a better photo. The sensor resolution isn't the issue on these -- it's the fact that I shot them all at f/32 to get a large depth of field, because at the time I didn't realize how much the diffraction caused by the narrow aperture was spoiling the pictures. The resolution allowed by the lens at that aperture isn't very good.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Troutnut on Jul 22, 2006July 22nd, 2006, 5:36 am EDT
My copy of Hatches II is packed away in boxes like most of the rest of my stuff until August, but the date and general appearance seem right. I don't know how to tell mollis apart from strigula and guttata, which often hatch together with it, but I'll tentatively put this specimen in mollis for now.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist